Air containing 1.5% of SO2 (yin) needs to be scrubbed with water in a counter current cylindrical packed tower. A tower diameter of 1.4 m is used. Total gas flow rate is 100 kmol/h (V). Solute free water enters from the top of the tower. The concentration of SO2 needs to be reduced to at least 0.1% (yout) in the exit gas. The gas phase and liquid phase mass transfer coefficients based on mole ratio unit are: kx =1.5 kmol/m2 h and ky = 2.25 kmol/m2 h. The equilibrium relation is y=0.63*x. Specific interfacial area of gas-liquid contact (a) is 50 m2 /m3 . The carrier gas may be considered insoluble in the solvent and the solvent may be considered nonvolatile. Assume dilute species (x = X, y=Y) with constant flow rates (L = L’, V = V’) and isothermal and isobaric trays/stages. (d) Calculate minimum water flow rate (L’min) to perform the operation. (e) If the actual liquid rate is 1.5 times the minimum value, calculate packing height (lT) required for the desired separation. (f) Solve for the theoretical number of trays (Nt) using the Kremser relationship and find HETP.

Silica, sio2, is formed on silicon as an electrically insulating layer for microelectronic devices. silica is formed when silicon is exposed to o2 gas at an elevated temperature. at 900˚c, it takes 90 minutes for the oxygen to diffuse from the surface to form a 0.06 micron (0.06 x 10-6 m) thick layer of sio2 on

Is laundry detergent an acid or a base?

What is the relationship between wind and ocean waves? question 17 options: wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves. wind moving at higher speeds will transfer energy over a larger part of the ocean water, resulting in waves with a shorter wavelength. winds moving at higher speeds with cause water to move forward at faster rates, causing larger ocean waves. winds moving at higher speeds will affect deeper water, resulting in waves that move at a faster rate. how do temperature and salinity affect deepwater currents? question 15 options: as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.